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Reference: Norreys, PA, Kar, S, Green, A et al., (2016). Beamed neutron emission driven by laser accelerated light ions. New Journal of Physics.Citable link to this page:


Beamed neutron emission driven by laser accelerated light ions

Abstract: Highly anisotropic, beam-like neutron emission with peak flux of the order of 109 n/sr was obtained from light nuclei reactions in a pitcher–catcher scenario, by employing MeV ions driven by a sub-petawatt laser. The spatial profile of the neutron beam, fully captured for the first time by employing a CR39 nuclear track detector, shows a FWHM divergence angle of $\sim 70^\circ $, with a peak flux nearly an order of magnitude higher than the isotropic component elsewhere. The observed beamed flux of neutrons is highly favourable for a wide range of applications, and indeed for further transport and moderation to thermal energies. A systematic study employing various combinations of pitcher–catcher materials indicates the dominant reactions being d(p, n+p)1H and d(d,n)3He. Albeit insufficient cross-section data are available for modelling, the observed anisotropy in the neutrons' spatial and spectral profiles is most likely related to the directionality and high energy of the projectile ions.

Peer Review status:Peer reviewedPublication status:PublishedVersion:Publisher's version Funder: Engineering and Physical Sciences Research Council   Notes:© IOP Publishing 2016. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. The final version is available online from IOP at: [10.1088/1367-2630/18/5/053002]

Bibliographic Details

Publisher: IOP Publishing

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Journal: New Journal of Physicssee more from them

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Issue Date: 2016-04-29Identifiers

Urn: uuid:43a62ec5-0e20-437d-a062-419f0707b989

Source identifier: 623794


Issn: 1367-2630 Item Description

Type: Journal article;

Version: Publisher's versionKeywords: laser neutron ion Tiny URL: pubs:623794


Author: Norreys, PA - institutionUniversity of Oxford Oxford, MPLS, Physics, Atomic and Laser Physics - - - Kar, S - - - Green, A - - - A



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